Where can one buy Allectus? I’ve never heard of it.
Any place that sells product to turf farms and golf courses. If you have a golf course in your corner of your state, call their grounds folks and ask them where they buy their fertilizer products. Remember, these guys work early... pre-dawn until the course opens for the day.
Or, work thru the manufacturer, they should know who’s distributing their product in your neighborhood:
(broken link removed to http://www.fmcprosolutions.com/LawnCare/Products/Insecticides/Allectusinsecticide.aspx)
Or, find an equivalent alternative. Mallet is very popular, but the two have different strengths / weaknesses, do your reading:
https://www.hjefertilizer.com/all-p...rol/mallet-lambda-professional-insect-control
Around here (SE PA), Lebanon Turf is the big supplier of such products. They mix these insecticides with various fertilizer products, so you can broadcast it in a typical granular spreader (versus spraying), and fertilize while killing the grubs.
You can also buy insecticide+fertilizer products at home stores, Lowes Depot, etc. They’re just not very good, they mix those products way down, to help prevent boneheaded homeowners from burning their lawn or turning their well. If you can do some basic math and measure, you should be able to figure this out. Measure off one quarter acre of clear ground on your property (or 1000 to 5000 sq.ft. on a small property), as your starting point, so you can meter how much you’re using before you do the entire property.
In PA, it is legal for us to buy pro product for use on our own property. Licensing is only required if you are buying this product to put on other property, as in a landscape business.